High rebound elastic PU-80 shore A mold-on aluminum die-cast core wheel. This wheel is quiet and very comfort operation because of thick and elastic tread. The wheel is quiet in operation and absorbs shock and vibration. It helps prolong equipment life and protect floor. We compound PU by our own formula. The size is availalbe for 100x40mm, 125x40mm, 160x50mm, 200x50mm.